孙怡

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教授

博士生导师

硕士生导师

性别:女

毕业院校:大连理工大学

学位:博士

所在单位:信息与通信工程学院

办公地点:海山楼A420

联系方式:lslwf@dlut.edu.cn

电子邮箱:lslwf@dlut.edu.cn

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Research on a new detection method of slab surface crack in mould during continuous casting

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论文类型:期刊论文

第一作者:Liu, Yu

通讯作者:Liu, Y (reprint author), Dalian Univ Technol, Sch Informat & Commun Engn, 2 Linggong Rd, CN-116024 Dalian, Peoples R China.; Liu, Y (reprint author), Northeast Elect Power Univ, Sch Mech Engn, 169 Changchun Rd, CN-132012 Jilin, Jilin, Peoples R China.

合写作者:Wang, Xudong,Sun, Yi,Yao, Man,Gao, Yali,Wang, Fuwang,Wang, Junyao

发表时间:2018-11-17

发表刊物:METALLURGICAL RESEARCH & TECHNOLOGY

收录刊物:SCIE、EI

卷号:115

期号:1

ISSN号:2271-3646

关键字:longitudinal crack; visual characteristics; continuous casting; mould temperature

摘要:Based on the mould temperature measured by thermocouples during slab continuous casting, a new thermograph with difference of temperature change is developed to detect slab cracks. This thermograph allows the characteristics of longitudinal crack during formation and propagation process to be captured and extracted by means of computer image processing algorithms, such as the maximum difference of temperature change, the mean difference of temperature change, height and width, aspect ratio and moving velocity. These characteristics are also compared to the normal and abnormal cold regions. The results show that the maximum and mean differences of temperature change are very large. The moving velocity is almost close to casting speed. The cold region is almost parallel to casting direction. The aspect ratio of cold region caused by longitudinal crack is very large, which is different to other abnormalities. These characteristics of abnormal regions can be used to judge longitudinal crack, normal continuous casting and other abnormalities. This method presents some visual characteristics of cold regions caused by longitudinal crack to operators clearly. Meanwhile, it also has a positive meaning to the intelligence and visualization of mould monitoring during slab continuous casting.